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National Drinking Water Database

Pyrene in California

Pyrene is a polycyclic aromatic hydrocarbon (PAH) released as a pollutant from the incomplete combustion of fossil fuels.

The Most Polluted Communities in California

3 water utilities reported detecting Pyrene in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Pyrene level

RankSystem Population Served Positive test results of total reported tests Average Level
1Lost Hills Utility District
Lost Hills, CA
2,7721 of 20.11 ppb
(0 to 0.21 ppb)
2City of Atwater
Atwater, CA
26,5151 of 20.05 ppb
(0 to 0.1 ppb)
3City of Ceres
Ceres, CA
30,0381 of 40.03 ppb
(0 to 0.11 ppb)

Health Based Limits for Pyrene

Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.200 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.830 ppb

Violation Summary for Pyrene in California

There are no violations reported for this contaminant in California